x86: Enable Prefer_No_AVX512 for Hygon model 0x8

Extend the Prefer_No_AVX512 tuning to cover Hygon model 0x8.

Benchmarks on Hygon platforms show that EVEX implementations
are often more profitable than AVX512 paths. The existing logic
already enables Prefer_No_AVX512 for model 0x7. Apply the same
preference to model 0x8 to ensure consistent IFUNC selection
behavior across newer Hygon processors.

Signed-off-by: xiejiamei <xiejiamei@hygon.cn>
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index 73ee4f2bb83342964f7551246c3d747b6fa1cab8..a453136827cbd997374484e48ea90eaee697fddb 100644 (file)
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -1135,7 +1135,7 @@ disable_tsx:
          cpu_features->preferred[index_arch_AVX_Fast_Unaligned_Load]
            &= ~bit_arch_AVX_Fast_Unaligned_Load;
        }
-      else if (model == 0x7)
+      else if (model == 0x7 || model == 0x8)
        {
          /* Benchmarks indicate evex can be more profitable on Hygon
             hardware than AVX512.  */